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milvus-io/milvus

This system is a distributed vector database platform that manages the full lifecycle of vector and scalar data, including ingestion, indexing, and search. It provides a Go SDK client for interacting with the system and supports various index types and data formats. The codebase includes extensive tooling for building, testing, and deploying the system across different environments, including Docker, Kubernetes, and Windows. It also features a comprehensive set of migration and maintenance utilities for data consistency, metadata upgrades, and configuration management.

49.0

Weak · 6 August 2026

591k

lines of production code

Go

primary language

19

bus factor · 449 authors in all

2

measurements over time

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How it got here

2019–2022 · Architecture and tooling modernization

This period focused on modernizing the codebase through a comprehensive C++ build system overhaul, the introduction of rigorous code quality and development tooling, and the implementation of a new generic gRPC client architecture. Concurrently, the project established robust metadata management with composite update support, added a metadata migration tool for version upgrades, and expanded test coverage across the distributed components.

92 changes

2023–2024 · streaming architecture and Go SDK

This period focused on implementing the new streaming node architecture, introducing a Write-Ahead Log (WAL) system with interceptors, time-tick synchronization, and adaptive rate limiting. Concurrently, the project developed a comprehensive Go SDK client (v3.0.0) with support for row-based inserts and complex data types, while also adding data import utilities for various file formats.

150 changes

2025–2026 · Unified coordination and streaming architecture

The codebase underwent a major architectural consolidation, merging RootCoord, DataCoord, and QueryCoord into a single MixCoord service with a unified client. This period also introduced a comprehensive streaming node infrastructure, including a Write-Ahead Log (WAL) system, a streaming node manager, and a dedicated broadcaster for message coordination. Additionally, the system expanded its capabilities with CDC replication support, external function execution, and advanced text search indexing.

71 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 6 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit a9d0453bd2 — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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